Supporting tower



July-14,1925. 1,545,613

, D. R. SCHOLES I SUPPORTING TQWER Filed Jan. 19. 1925 Patented July 14,- 1925.

UNITED STATES PATENT OFFICE- 'DANIEL R. SCHOLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO AERMOTOB, COMPANY,

. OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SUPPORTING TOWER.

Application filed January 19,-1925. Serial No. 3,373.

To all whom it may concern:

Be it known that I, DANIEL R. SoHoLEs, a citizen of the United States, residing at Chicago, in the county of Cook and the State of Illinois, have invented a certain new and useful Improvement in Supporting Towers, of which the following is a full, clear, concise, and exact description.

My invention relates to supporting towers such as are employed for suspending high tension circuit wires or other loads which towers of. former construction are not properly adapted .to carry. The principal strains which such towers withstand may be listed as being inclusive of those due: (a) to the wind pressure on the wires and to corners in the lines which throw strains upon the cross arms parallel thereto; (6) to the breakage of one or more transmission wireson one side of the towerwhile remaining unbroken upon the other side, causing heavy strains to be applied at right angles to the cross arms in an approximately horizontal direction at either end of the wardly arm or at themiddle thereof or at all three points along the arm; and. (0) to the weight of the wires and of the ice coatings forming thereon in wintertime.

In accordance with one characteristic of my invention the tower is made up of an uptapering main member and two upwardly diverging supplemental members each also upwardly tapering, the main member being desirably in the form of a truncated pyramid the planes of whose faces intersect at I a point above the points of intersection of the converging faces of the supplemental members, and desirably at the center of the load that is to be carried by the. tower.

In accordance with another characteristic of the invention the supplemental members (or the supplemental member if there be but one), are of wedge formation. A tower embracing all characteristics of my invention has the bases of its supplemental members coincident with the top of the main member if the main member is of truncated form, and theconverging faces of the supplemental members are deflected continua-dons of faces of the main member. Where the main member is of truncated form ample clearance is afforded between the supplemental members for the r p n of a part of the load that is to be borne. Where the tower is employed to support the transmission mains of a three phase system of alternating current of distribution, the middle main is disposed between the supplemental members that are themselves interposed between the outer mains.

The invention will be more fully explained in connection with the accompanying drawing in which Fig. 1 is a front face view of a tower as it is preferably constructed; Fig. 2 is a side face view of the tower; and 3 is a diagrammatic View illustrating the intersections of the planes of the faces of the supplemental members of the tower in a common horizontal line that is perpendicular to the upright axis of the main member whose faces converge above the supplemental members.

The main upwardly tapering member 1 of the tower is in the form of a truncated pyramid constructed of angle iron, the angle 'iron corner posts or rails 2 thereof being vergeupwardly with respect to: each other 1 are symmetrically related, the vertical axis of the main truncated member passing midway between the supplemental members. Inasmuch as the supplemental members upwardly diverge, their axes are obl que to their common base, and to the axis of the main member 1. The converging faces of the supplemental members are deflected continuations of faces of the main member 1, as is. made most clear by reference Fig. 3. The planes of the faces of the main member intersect above the intersection of the planes of the converging faces of the supplemental members.

There are shown parallel vertical uprights 8 joined with the tops of the supplemental members upon which the cross arm 7 is mounted. Other cross arms 9 and 10 are carried upon these uprights.

The transmission mains 11 of one three phase transmission circuit are carried by the lowermost cross arm 7, the middle transmission main 11 being between the supplemental tower members which themselves are betweenthe outer mains 11. The cross arm 9 carries the mains 12 of another three phase transmission circuit while the cross arm 10 carries the mains 13 of still another three phase transmission circuit, two of the mains being carried upon the outer ends of each arm and an intermediate main being car ried by the middle of each arm between the uprights 8 that are disposed between the outer mains. The usual strings of insulators 14 are interposed between the cross arms and the transmission mains carried thereby. The planes of the faces of the main, pyramidal, member, that are deflected to constitute the converging faces of the supplemental members intersect at the cross arm 9 which is at the load center and above the points of intersection of the converging faces of the supplemental members toenable the load to be properly carried by and located upon the tower with minimum stress upon the bracing angle irons 3 and 6.

With a tower structure as illustrated and described, certain of the stresses exerted upon the cross arms located as set forth are withstood without developing any undue stresses in the bracing members 3 of the main member of the tower. As a consequence these bracing members may be very light.

of minimum weight consistent with the load The tower of my invention may bemade' to besupported and with the factor of safety employed.

I claim:

1. A support including a main upright member of pyramidal formation; and upwardly diverging supplemental members of wedge formation Whose converging sides are deflected continuations of sides of the main member.

2. A support including a main upright member of pyramidal formation; and upwardly diverging supplemental members of above the points of intersection of the planes of the sides of the supplemental members.

4. A support including a main upright tapering member; and a wedge shaped supplemental member constituting a continuation of the main member and inclined to its axis.

In witness whereof, I hereunto subscribe my name.

DANIEL R. SCHOLES. 

